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dc.creatorObradović, Nina
dc.creatorFilipović, Suzana
dc.creatorMarković, Smilja
dc.creatorMitrić, Miodrag
dc.creatorRusmirović, Jelena D.
dc.creatorMarinković, Aleksandar D.
dc.creatorAntic, Vesna
dc.creatorPavlović, Vladimir B.
dc.date.accessioned2018-03-01T17:36:11Z
dc.date.available2018-03-01T17:36:11Z
dc.date.issued2017
dc.identifier.issn0272-8842
dc.identifier.issn1873-3956
dc.identifier.urihttps://vinar.vin.bg.ac.rs/handle/123456789/1558
dc.description.abstractIn this study, porous macro- and micro-cellular wollastonite-based ceramics was synthesized. A ceramic precursor, methylhydrocyclosiloxane, together with micro-sized CaCO3, was used as a starting material. After 20 min of ultrasound treatment, and calcination at 250 degrees C for 30 min, different pore-forming agents were added to the as-obtained powders. Differential thermal analysis was used to determine characteristic temperatures of processes occurring within powders during heating. Based on the obtained results, the sintering regime was set up. The prepared mixtures were pressed into pallets and sintered at 900 degrees C. During the sintering regime, porous wollastonite-based ceramics was obtained. The phase composition of the sintered samples, as well as the microstructures, were analyzed by using X-ray diffraction and SEM. A two-phase system was detected in all samples, CaSiO3 wollastonite and Ca2SiO4 larnite, and their ratio varied with each pore-forming agent. It was observed that the addition of different pore-forming agents resulted in significantly different microstructures. In a batch test, the influence of pH, the contact time and the initial ion concentration on the adsorption efficiency of As+5, Cr(+6)and phosphate ions on the synthesized adsorbents were studied. Time-dependent adsorption is best described by the pseudo-second-order kinetic model and the Weber-Morris model, which predict intra-particle diffusion as a rate-controlling step of the overall process. High adsorption capacities, 21.93, 23.88, and 27.29 mg g(-1), were obtained for the CaCO3-siloxane-nanocellulose sorbent, and similar/lower capacities were obtained for the CaCO3-siloxane-PMMA and CaCO3-siloxane-cotton wool adsorbents.en
dc.relationinfo:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/172057/RS//
dc.rightsrestrictedAccessen
dc.sourceCeramics Internationalen
dc.subjectPore-forming agentsen
dc.subjectSinteringen
dc.subjectWollastoniteen
dc.subjectAdsorption capacityen
dc.titleInfluence of different pore-forming agents on wollastonite microstructures and adsorption capacitiesen
dc.typearticleen
dcterms.abstractРусмировиц, Јелена; Обрадовиц, Нина; Aнтиц, Весна; Филиповиц, Сузана; Марковиц, Смиља; Митрић Миодраг; Маринковиц, Aлександар; Павловиц, Владимир;
dc.citation.volume43
dc.citation.issue10
dc.citation.spage7461
dc.citation.epage7468
dc.identifier.wos000400880000012
dc.identifier.doi10.1016/j.ceramint.2017.03.021
dc.citation.rankaM21
dc.identifier.scopus2-s2.0-85014780511


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